mirror of
https://asciireactor.com/otho/psdlag-agn.git
synced 2024-11-22 19:25:07 +00:00
44 lines
1.1 KiB
Plaintext
44 lines
1.1 KiB
Plaintext
|
time-domain techniques provide average time-lag
|
||
|
|
|
||
|
|
more information is contained
|
||
|
|
|
||
|
|
opticla analyses gives avg time-lag between driving and repreoccessing light curve
|
||
|
|
|
||
|
|
more information in the light curves than just the average time lag
|
||
|
|
|
||
|
|
X-ray astornomers have developed technique to get time-lag as a function of freq. or time scales
|
||
|
|
|
||
|
|
We want to be the first people to apply this technique to optical curves
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
standard fourier technique:
|
||
|
|
|
||
|
|
astronomers using CC techniques to check corrleation of light curves
|
||
|
|
|
||
|
|
using fourier techniques to learn if time-delay is different as a function of time scales/freq.
|
||
|
|
|
||
|
|
taking a fourier transform:
|
||
|
|
|
||
|
|
each sin and cos has a power and aphse, for each fourier frequency
|
||
|
|
|
||
|
|
two light curves, each has a power and phase set, and the phase different as the time-lag
|
||
|
|
|
||
|
|
so can figure out the time-lag at each fourier frequency
|
||
|
|
|
||
|
|
X-ray data is evenly distributed
|
||
|
|
|
||
|
|
optical data is not evenly distributed
|
||
|
|
|
||
|
|
- maybe because of weather
|
||
|
|
|
||
|
|
certain x-ray telescopes have gappy data because of low-earth orbit
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
power in the fourier techniques, more information than the cross-correlation curve
|
||
|
|
|